Excellent performance by Louis Edmonds, as usual. Naomi was unfair to Joshua when she told him all he cared about was revenge. It was obvious that Joshua was grief-stricken by his daughter's death. But Naomi was grief-stricken, too, so she couldn't see what was before her eyes.
When Joshua talked to Vicky at the Collinsport Gaol, I thought to myself that this was the point at which Vicky should get her mind - such as it was - in gear, and try to figure out what was going on. She herself can't say that witches don't exist, because she knows that the supernatural exists, or else she wouldn't have been transported back to 1795. Therefore it must be possible for witches to exist. She knows that there was something strange about the fire in her bedroom at the Old House, so from that she can deduce that there is a supernatural force at work here, whether or not it is a witch. And right now she has lots of time to play Nero Wolfe or Hercule Poirot, and put her little gray cells to work.
I believe that Vicky should be thinking - but I know it wouldn't do any good, because motive is no longer going to get her anywhere. It is true that Angelique apparently got $20,000 out of her short-lived marriage to Barnabas - and in 1795 that must have been a fortune - but if money was what Angelique wanted, it would have been far simpler for her to marry Jeremiah. If she loved Barnabas, then why did Barnabas die? If she wanted revenge, then what did she have against the Collins family? All three Dupres family members are still alive, and since she was a Dupres servant, surely it would be against the Dupres family that she would want revenge. None of it makes any sense to a logical mind - but Vicky should still be trying to make sense of it. It's her only hope.
I felt very sorry for Barnabas in the mausoleum, listening to his parents grieving, and unable to to talk to them. He's going to live a long, long time after they die.